Paul -

I don't argue that there isn't room for improvement and that the newer
materials have benefits.

But the bottom line is that the increases in L/D and *aerodynamic
performance* aren't likely to change by large amonths. And the new
materials have little or no effect on the aerodynamic performance or
the shape of the wings.

With all due respect (I'm not trying to be antagonistic), please read
Fred Thomas' "Fundamentals of Sailplane Design" book or go study
aerodynamics before trying to lecture about the subject.

--Noel